Cleveland C32617 Square End Mill 1/4 in 4 Flute Cobalt

Product Description

The CLEVELAND C32617 is a 4-flute cobalt square end mill designed for high-performance milling in demanding materials. Built from M42 cobalt high-speed steel and finished with a TiCN coating, it delivers extended tool life and heat resistance in applications where standard HSS tooling falls short. The cutting diameter is 0.25 inches with a 0.625-inch length of cut, a 0.375-inch straight shank with Weldon flat, and an overall length of 2.4375 inches. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation while the centercutting design allows direct plunge entry into workpieces.

This end mill is suited for milling high-temperature alloys, stainless steel, and carbon and alloy steels in both manual and CNC machining centers. It fits standard collet chucks, ER collet systems, and Weldon-style holders accepting a 0.375-inch shank. The HGC-4C series targets machinists working in job shops, aerospace component shops, and production environments where tool longevity and surface finish in tough alloys are critical. It is a regular-length geometry, making it appropriate for general-purpose slotting, profiling, and peripheral milling.

Key Features

• M42 cobalt steel construction resists heat buildup in high-temperature alloy and stainless steel applications
• TiCN coating increases surface hardness and reduces friction at the cutting edge
• 4-flute, 30-degree right-hand spiral geometry balances chip evacuation with rigidity
• Centercutting design allows direct plunge milling without pre-drilled entry
• Straight-cylindrical shank with Weldon flat for positive grip in Weldon-style tool holders
• Regular-length OAL of 2.4375 inches minimizes deflection in standard reach applications

Compatibility

Designed for use in toolholders accepting a 0.375-inch straight shank with Weldon flat. Compatible with high-temperature alloys, stainless steel, and steel workpiece materials per the HGC-4C series specification.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer or collet system is properly locked before inserting or removing the end mill. Confirm runout with a dial indicator after mounting to maintain cutting accuracy and prevent premature edge wear. Follow the machine tool manufacturer's recommended speeds and feeds for cobalt tooling in the target workpiece material.